<h1>鼠标上下滚动 内容横向滚动</h1>
<button @click="handleLeft">左</button>
<button @click="handleRight">右</button>
<div class="box" ref="box" :style="computedStyle">
    <div class="box-inner" ref="scrollBox">
        <div class="box-inner-content">
            <div class="content">
                <div class="card-item" v-for="v in 10">{{v}}</div>
            </div>
        </div>
    </div>
</div>